<template>
	<view>
		<!-- 使用自定义的搜索组件 -->
		<!-- <my-search :bgcolor="'pink'" :radius="3"></my-search> -->
		<my-search :bgcolor="'pink'" @click="gotoSearch"></my-search>
	<view class="scroll-view-container">
		
		<!-- 左侧的滑动区 -->
		<scroll-view class="left-scroll-view" scroll-y="true" :style="{height: wh + 'px'}">
			<block v-for="(item,i) in cateList" :key="i">
				<view :class="['left-scroll-view-item',i=== active ? 'active' : '']"
				@click="activeChanged(i)">{{item.cat_name}}</view>
				<!-- 当i等于active对应的值则设置一个'active'的类名，不等于则不添加 -->
			</block>
			
		</scroll-view>
		<!-- 右侧的滑动区 -->
		<scroll-view scroll-y="true" :style="{height: wh + 'px'}" :scroll-top="scrollTop">
			<view class="cate-lv2" v-for="(item2,i2) in cateLevel2"  :key="i2">
				<!-- 二级分类的标题 -->
				<view class="cate-lv2-title">/{{item2.cat_name}}/</view>
				<!-- 当前二级分类下的三级分类列表 -->
				<view class="cate-lv3-list">
					<view class="cate-lv3-item" v-for="(item3,i3) in item2.children" :key="i3" @click="gotoGoodsList(item3)">
						<!-- 图片路径替换 -->
						<image :src="item3.cat_icon.replace('ugo-dev','hmugo-web')"></image>
						<text>{{item3.cat_name}}</text>
					</view>
				</view>
			</view>
		</scroll-view>
	</view>
	</view>
</template>

<script>
	import badgeMix from '@/mixins/tabbar-badge.js'
	export default {
		mixins:[badgeMix],
		data() {
			return {
				//当前设备可用的高度,默认为0
				wh: 0,
				cateList:[],
				active:0,
				//二级分类的列表
				cateLevel2:[],
				scrollTop:0
			};
		},
		onLoad() {
			const sysInfo = uni.getSystemInfoSync()
			this.wh = sysInfo.windowHeight - 50
			this.getCateList()
		},
		methods:{
			//获取分类列表的数据
			async getCateList(){
			    const {data: res} = await uni.$http.get('/api/public/v1/categories')
				if(res.meta.status !==200) return uni.$showMsg()
				this.cateList = res.message
				
				//为二级分类赋值
				this.cateLevel2 = res.message[0].children
			},
			activeChanged(i){
				//当点击时更改索引值实现前面的小竖线切换
				this.active = i
				
				//重新为二级分类赋值
				this.cateLevel2 = this.cateList[i].children
				
				//scrollTop需要跟换值才能实现复原 如果scrollTop值已经为0则赋值为1，否则赋值为0
				this.scrollTop = this.scrollTop === 0 ? 1 : 0 
			},
			gotoGoodsList(item){
				uni.navigateTo({
					url:'/subpkg/goods_list/goods_list?cid='+item.cat_id
				})
			},
			gotoSearch(){
				uni.navigateTo({
					url:'/subpkg/search/search'
				})
			}
		}
	}
</script>

<style lang="scss">
.scroll-view-container{
	display: flex;
	.left-scroll-view{
		width: 120px;
		
		.left-scroll-view-item{
			background-color: #f7f7f7;
			line-height: 60px;
			text-align: center;
			font-size: 12px;
			&.active{
				background-color: #FFFFFF;
				position: relative;
				
				&::before{
					content: '';
					display: block;
					width: 3px;
					height: 30px;
					background-color: red;
					position: absolute;
					top: 50%;
					left: 0;
					transform: translateY(-50%);
				}
			}
		}
}	

}
.cate-lv2-title{
	font-size: 12px;
	font-weight: bold;
	text-align: center;
	padding: 15px 0;
}
.cate-lv3-list{
	display: flex;
	// flex-wrap：填充满时进行自动换行
	flex-wrap: wrap;
	
	.cate-lv3-item{
		width: 33.33%;
		display: flex;
		flex-direction: column;
		justify-content: center;
		align-items: center;
		margin-bottom: 10px;
		image{
			width: 60px;
			height: 60px;
		}
		text{
			font-size: 12px;
		}
		
	}
}
</style>